Enhanced omnidirectional photon coupling via quasi-periodic patterning of indium-tin-oxide for organic thin-film solar cells

Ping Chen Tseng, Min Hsiang Hsu, Min An Tsai, Chih Wei Chu, Hao-Chung Kuo, Pei-Chen Yu*

*Corresponding author for this work

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

Enhanced optical coupling via an indium tin oxide quasi-periodic structure (ITO-QPS) as the frontal electrode for organic thin film solar cells was demonstrated. The QPS was fabricated via scalable polystyrene colloidal lithography, which effectively coupled the incident light to the photo-active layer through antireflection and light-trapping mechanisms. The cell efficiency was boosted from 2.91% to 3.26%, corresponding to a 12% enhancement after ITO patterning. Moreover, the angle-resolved absorption spectroscopy also confirmed excellent light coupling at large angles of incidence to 45°, particularly in the wavelength range between 540 and 670 nm. The ITO-QPS guarantees broadband and omnidirectional light harvesting and is widely applicable to a variety of thin film solar cells.

Original languageEnglish
Pages (from-to)886-890
Number of pages5
JournalOrganic Electronics
Volume12
Issue number6
DOIs
StatePublished - 1 Jan 2011

Keywords

  • Omnidirectional
  • Optical coupling
  • Thin-film solar cell

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